Multi-Frequency Transmitting Beamforming Algorithm Based on Cross Array

doi:10.3969/j.issn.1000-565X.2016.01.004

Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (1): 22-29.doi: 10.3969/j.issn.1000-565X.2016.01.004

• Electronics, Communication & Automation Technology • Previous Articles Next Articles

Multi-Frequency Transmitting Beamforming Algorithm Based on Cross Array

LIU Xue-song ZHOU Fan ZHOU Hong TIAN Xiang JIANG Rong-xin CHEN Yao-wu

Institute of Advanced Digital Technology and Instrumentation//Zhejiang Provincial Key Laboratory for Network Multimedia Technologies,Hangzhou 310027,Zhejiang,China

Received:2015-04-21 Revised:2015-07-28 Online:2016-01-25 Published:2015-12-09
Contact: 周凡( 1978-) ，男，副教授，主要从事嵌入式系统、声纳信号处理、FPGA 并行计算研究． E-mail:lt23yuan@yahoo.com.cn
About author:刘雪松( 1988-) ，男，博士，主要从事嵌入式系统、声纳信号处理研究． E-mail: 11015006@ zju． edu． cn
Supported by:
Supported by the General Program of the National Natural Science Foundation of China( 41276090) and the National High-Tech R&D Program of China( 2014AA091301)

Abstract

Abstract: In order to solve the problems of the huge hardware cost and computational load in underwater 3D acoustic imaging system,which is caused by the large number of elements in a receiving planar array,a multi-frequency transmitting beamforming algorithm is proposed for the real-time 3D acoustic imaging on the basis of cross array.In the algorithm,first,transmitting steering directions are subdivided into several sectors.In each sector,a series of fan-shaped beams with different frequencies are transmitted sequentially,and each beam is steered to a specific direction.Then,the number of transmissions is reduced from the number of beams to the number of sectors,thus shortening the scanning time.Simulation results and the analysis of computational load show that the proposed algorithm can obtain the same performance as the direct beamforming method on the basis of the receiving planar array and dramatically reduce both the transducer number and the computational load.Real underwater experiments demonstrate that the proposed algorithm can meet the real-time requirement in underwater 3D acoustic imaging applications.

Key words: real-time 3D acoustic imaging, multi-frequency transmitting, cross array, beamforming, computational requirement

LIU Xue-song ZHOU Fan ZHOU Hong TIAN Xiang JIANG Rong-xin CHEN Yao-wu. Multi-Frequency Transmitting Beamforming Algorithm Based on Cross Array[J]. Journal of South China University of Technology (Natural Science Edition), 2016, 44(1): 22-29.

References

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Multi-Frequency Transmitting Beamforming Algorithm Based on Cross Array

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